Skeletons have been found that indicate that mice with jaw angles less than 30 degrees were once found on Island B. Which explanation best accounts for this?

(A) A small jaw angle hinders the survival of mice on Island B.
(B) A large jaw angle hinders the survival of mice on Island A.
(C) A small jaw angle encourages the survival of mice on Island C.
(D) A large jaw angle encourages the survival of mice on Island A.

A chain of three small islands was found to be the home to a small species of mouse. The angle of jaw opening was found to vary significantly. The average size angle of the maximal jaw opening found in mice at 10 locations on the three small islands is shown in Figure 1, below.

Transcribed Image Text:

Island A A1: 22° A2: 21° A3: 22° Island B B4: 32° B1: 31° Island C B3: 32° B2: 34° C1:219 €3: 21° C2: 21°